QQuestionChemistry
QuestionChemistry
"If (S)-glyceraldehyde has a specific rotation of - 8.7°, what is the specific rotation of (R)- glyceraldehyde?
A) - 8.7°
B) + 8.7°
C) 0.0°
D) cannot be determined from the information given"
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Answer
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Step 1: Understand the problem
The specific rotation of a chemical compound is a measure of its optical activity, which describes how it rotates plane-polarized light. (S)-glyceraldehyde and (R)-glyceraldehyde are enantiomers, meaning they are mirror images of each other with non-superimposable structures. Enantiomers have equal but opposite specific rotations.
Step 2: Recall the given information
The specific rotation of (S)-glyceraldehyde is - 8.7°.
Final Answer
The specific rotation of (R)-glyceraldehyde is + 8.7°.
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